A charge against a 47-year-old London man who has been in custody since last September for the brutal death of his domestic partner has been upgraded to manslaughter.

Katherine Adam, 58, suffered serious injuries on Sept. 1, 2013, and was taken to hospital from her Simcoe St. apartment. She died of her injuries two weeks later.

William Wayne Feather was arrested and charged with aggravated assault. Friday, police said that as a result of an investigation they now have charged Feather with manslaughter. He is due to appear in court July 21.

Adam’s name wasn’t released by police last year. She had been assaulted and suffered what police described as “serious traumatic injuries.” Police didn’t disclose where the assault happened or who was involved because it was related to a domestic violence investigation, said Const. Ken Steeves.

“We could only disclose limited information . . . where a woman was in medical distress as a result of an assault.”

But the investigation didn’t end after Adam’s death. There were consultations with the coroner’s office, forensic pathologists and the Crown.